I made some small updated to Frozen Night and added the Vasuthant-summoning boost to it. I'm going a little overboard on restatting Bonespikes, too. I'm planning to make a few of them of different varieties. For my immobile bone spires, I'm planning to use the following abilities (adjusted from
PoC turrets).
Bunker: Each bone spire has a base of necromantically empowered bone. A spire can extend itself from this base or retract back into it as a standard action that provokes an attack of opportunity.
While retracted, the bone spire like a turtle hiding within its shell, hidden and protected from attack. However, the spire it unable attack or interact with anything outside its base. It has improved cover (+8 to AC, +4 on Reflex saves, and the equivalent of Improved Evasion), hardness 6 (reducing the damage from any source by 6), and takes half damage from all ranged attacks before applying hardness. A DC 20 Spot check is required to notice that the spire's base is more than just a pile of bone. This may increase to 25 or 30 depending on how well the spire's base is hidden or camouflaged within the surrounding terrain. While retracted, other creatures can move through the bone spire's space, but it counts as difficult terrain.
Emplaced: Bone spires are usually built into the surrounding fortifications. Until they are destroyed, they cannot move or be moved from their space separately from the object, vehicle, or structure to which they are attached. Even magical movement and teleportation is ineffective. Some bone spires have a limited ability to move across the surface of the fortification to which they are attached.
Because emplaced bone spires are immovable, certain attack forms function differently against them. An emplaced bone spire cannot be knocked prone. Bull rush, overrun, and trip attempts against them automatically fail. A bone spire can be grappled, but not pinned, and remains grappled only while the grapple remains in its space; consequently, a creature with Improved Grab cannot pull the bone spire into its space and must move into the bone spire's space in order to maintain the grapple. A bone spire cannot be swallowed whole. A bone spire can be engulfed, but only while the engulfing creature occupies its space.
An emplaced bone spire must be animated at the location it is to be emplaced.
An emplaced bone spire attached to a vehicle uses that vehicle's effective Dexterity score or its own, whichever is higher.
This is such a weird idea, casting a dominate spell on yourself so no one else can dominate you. How does that even work? You end up in a recursive loop of "I have to tell myself to act so I can tell myself to act." It's turtles all the way down...
Self: Me! Act normally, and try not to drool too much.
Self: Okie dokie!